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The first acoustic-suspension loudspeaker, the AR-1, was introduced at the New York Audio Show in 1954, and was an instant success. Villchur continued to improve loudspeakers, coming out with new models roughly every two years. The AR-2, produced in 1956, was a no-frills version of the speaker at a lower price.
Loudspeaker acoustics is a subfield of acoustical engineering concerned with the design of loudspeakers. [1] It focuses on the reproduction of sound and the parameters involved in doing so in actual equipment.
The two most common types of speaker enclosure are acoustic suspension (sometimes called pneumatic suspension) and bass reflex.In both cases, the tuning affects the lower end of the driver's response, but above a certain frequency, the driver itself becomes the dominant factor and the size of the enclosure and ports (if any) become irrelevant.
The concept was innovated within acoustic enclosure design, and originally termed an "acoustical labyrinth", by acoustic engineer and later Director of Research, Benjamin Olney, who developed the concept at the Stromberg-Carlson Telephone Co. in the early 1930s while studying the effect of enclosure shape and size on speaker output, including ...
For 25 °C air with 50% relative humidity the expression evaluates to 9.438×10 −7 s 3 /m 3. From the efficiency, we may calculate sensitivity, which is the sound pressure level a speaker produces for a given input: A speaker with an efficiency of 100% (1.0) would output a watt for every watt of input.
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